Recent advances in clay mineral-containing nanocomposite hydrogels

Zhao, Li Zhi and Zhou, Chun Hui and Wang, Jing and Tong, Dong Shen and Yu, Wei Hua and Wang, Hao (2015) Recent advances in clay mineral-containing nanocomposite hydrogels. Soft Matter, 11 (48). pp. 9229-9246. ISSN 1744-683X

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Abstract

Clay mineral-containing nanocomposite hydrogels have been proven to have exceptional composition,
properties, and applications, and consequently have attracted a significant amount of research effort
over the past few years. The objective of this paper is to summarize and evaluate scientific advances in
clay mineral-containing nanocomposite hydrogels in terms of their specific preparation, formation
mechanisms, properties, and applications, and to identify the prevailing challenges and future directions
in the field. The state-of-the-art of existing technologies and insights into the exfoliation of layered clay
minerals, in particular montmorillonite and LAPONITEs, are discussed first. The formation and structural
characteristics of polymer/clay nanocomposite hydrogels made from in situ free radical polymerization,
supramolecular assembly, and freezing–thawing cycles are then examined. Studies indicate that additional
hydrogen bonding, electrostatic interactions, coordination bonds, hydrophobic interaction, and even covalent
bonds could occur between the clay mineral nanoplatelets and polymer chains, thereby leading to
the formation of unique three-dimensional networks. Accordingly, the hydrogels exhibit exceptional
optical and mechanical properties, swelling–deswelling behavior, and stimuli-responsiveness, reflecting the
remarkable effects of clay minerals. With the pivotal roles of clay minerals in clay mineral-containing
nanocomposite hydrogels, the nanocomposite hydrogels possess great potential as superabsorbents, drug
vehicles, tissue scaffolds, wound dressing, and biosensors. Future studies should lay emphasis on the
formation mechanisms with in-depth insights into interfacial interactions, the tactical functionalization of
clay minerals and polymers for desired properties, and expanding of their applications.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 16 Dec 2015 06:31
Last Modified: 05 Sep 2017 05:11
Uncontrolled Keywords: nanocomposite hydrogels; clay minerals
Fields of Research : 10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Identification Number or DOI: 10.1039/c5sm01277e
URI: http://eprints.usq.edu.au/id/eprint/28233

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